| I | undulate |
| you | undulate |
| he/she/it | undulates |
| we | undulate |
| you | undulate |
| they | undulate |
| I | have undulated |
| you | have undulated |
| he/she/it | has undulated |
| we | have undulated |
| you | have undulated |
| they | have undulated |
| I | undulated |
| you | undulated |
| he/she/it | undulated |
| we | undulated |
| you | undulated |
| they | undulated |
| I | had undulated |
| you | had undulated |
| he/she/it | had undulated |
| we | had undulated |
| you | had undulated |
| they | had undulated |
| I | will undulate |
| you | will undulate |
| he/she/it | will undulate |
| we | will undulate |
| you | will undulate |
| they | will undulate |
| I | will have undulated |
| you | will have undulated |
| he/she/it | will have undulated |
| we | will have undulated |
| you | will have undulated |
| they | will have undulated |
| I | am undulating |
| you | are undulating |
| he/she/it | is undulating |
| we | are undulating |
| you | are undulating |
| they | are undulating |
| I | have been undulating |
| you | have been undulating |
| he/she/it | has been undulating |
| we | have been undulating |
| you | have been undulating |
| they | have been undulating |
| I | was undulating |
| you | were undulating |
| he/she/it | was undulating |
| we | were undulating |
| you | were undulating |
| they | were undulating |
| I | had been undulating |
| you | had been undulating |
| he/she/it | had been undulating |
| we | had been undulating |
| you | had been undulating |
| they | had been undulating |
| I | will be undulating |
| you | will be undulating |
| he/she/it | will be undulating |
| we | will be undulating |
| you | will be undulating |
| they | will be undulating |
| I | will have been undulating |
| you | will have been undulating |
| he/she/it | will have been undulating |
| we | will have been undulating |
| you | will have been undulating |
| they | will have been undulating |
| I | would undulate |
| you | would undulate |
| he/she/it | would undulate |
| we | would undulate |
| you | would undulate |
| they | would undulate |
| I | would have undulated |
| you | would have undulated |
| he/she/it | would have undulated |
| we | would have undulated |
| you | would have undulated |
| they | would have undulated |
| I | would be undulating |
| you | would be undulating |
| he/she/it | would be undulating |
| we | would be undulating |
| you | would be undulating |
| they | would be undulating |
| I | would have been undulating |
| you | would have been undulating |
| he/she/it | would have been undulating |
| we | would have been undulating |
| you | would have been undulating |
| they | would have been undulating |
| You | undulate |
| we | Let's undulate |
| You | undulate |